Parents misjudge their kids and over protect them, which then creates a large gap between them and a large gap between the kid and his repressed emotions, which then he takes it all out on his games and people online.
Violent video games aren't the cause of violence , they're an escape to some kids, and the blame isn't on the kids nor the parents or even the media, its a mix of everything.
That boy is lucky to have a father like that, but not every person is lucky
what parents should do is embrace the fact that their kids are into something, and allow them to make mistakes.
what the kids should do is do mistakes , and never be afraid of doing these mistakes or else they will just be repressed and then it goes full circle back to the main problem which is repressed emotions
let your child have an opinion, don't shut them up, if (s)he sees violence on tv, (s)he wont turn into a savage killing machine, (s)he will instead learn and have an opinion on what is wrong or right, and whats wrong or right is subjective, because everything can be wrong or right.
I myself watched slasher horror movies like Pet Sematary , horror anime movies like Wicked City, some weird hentai that confused my idea of what a woman looks like naked, and a lot of violent video games, I haven't turned into a psychopathic killer yet, nor have I raped someone yet, instead i prefer stuff like Anima crossing nowadays, as I am in a very deep state of depression (but thats another story) with that being said , I did this all without my parents permission because they never let me do anything for myself , so I had the urge to watch that kind of stuff out of curiosity, you can never learn without curiosity , curiosity might kill the cat , but indifference kills human experience.
